Locking device for impulse-starters.



F. w. ANDREW.

LOCKING DEVICE FOR IMPULSE STARTERS.

APPLICATION FILED JUNE'29. 1918.

I 1,282,616, v Patented 00t.15,1918;

2 SHEETS-SHEET l.

km i W I (maven-[ oe SEM WV' I $1 10 Elk-tom F. W. ANDREW.

LOCKING DEVICE FOR IMPULSE STARTERS.

APPLICATION FILED JUNE 29.1918.

1,282,019. Patented Oct; 15, 8.

I 2$HEETS-$ HEE * rrn. series when FREDERICK VIILLIAM ANDREW, 0FBROOKLYN, NEW YORK, AS$IGI TOE T0 EIEiEPZANli MAGNETO 00., OF BROOKLYN,NEW YORK, A GOBORATIGN OE NEVJ' LOCKING- DEVICE FOR IMPULSE-STARTERS.

aeeaeie.

Specification of Letters Patent.

Patented that. 15.

Application filed June 29, 1913. Serial No. 242,612.

To all whom it may concern:

Be it known that I, FREDERICK WILLIAM ANDREW, a citizen of the UnitedStates, and a resident of the city of New York, borough of Brooklyn,county of Kings, and State of New York, have invented certain new anduseful Improvements in Looking Devices for Impulse-Starters, whereofthefollowing is a full, clear, and exact specification.

- My invention relates, to devices known in the art as impulse starters,by means of which a rapid rotatory motion is imparted to the armature ofa magneto at the moment of starting an internal combustion engine toproduce a spark of sufiicient intensity to ignite the explosive chargein the cylinder of the engine. These impulse starters comprise,generally, a driven element fixed to the rotatory part of a magneto, adriving element secured to the gear connecting it with'the engine, and aspring, set between the driven and the driving elements, so as to betensioned when the driving element is rotated in advance of the drivenone. After the engine has been started, the impulse starter operates asa coupling; in some of their constructions the aforementioned springbeing utilized also as the connecting means between the driving and thedriven elements, in others a separate coupling element is employed forthis purpose.

An example of this second method of construction is shown and describedin the U. S. Letters Patent No. 1,251,216. In this structure the yoke,designated 21 in the drawings, constitutes the coupling element. It ispermanently engaged with the driven element ofthe impulse starter, andis designed to be moved, by centrifugal force, into, and then held, inengagement with the driving ,lement, when the engine is running, and totlrop out of the engagement when the engine slows down or stops running.However, even in this kind of impulse startera the functioning of thedevice, or the ability to perform its function, depends on the spring,and the breaking of the spring renders these devices inoperative, notonly for the starting-of the engine, but also as means for transmittingrotatory motion from the driving shaft to the shaft of the rotatory partof the magneto, and then the magneto,

and the ignition, and consequently also the engine, are put outofaction.

The object of my invention is to provide show the sprin means forenabling a device of this kind to be used as a coupling in case of anaccidental breaking of the spring, to start the engine, and to maintainit in operation after having been started.

To this end my invention consists in de vising means for enabling theimpulse starter to he used as a coupling for maintaining the drivingconnection when the spring breaks, and in so combining these means withthe parts of the impulse starting device that they will not interfere,in

any way, with the operation of the impulse starters as astarting deviceas long as it stays in operative condition, and yet be readily availablefor the stated purpose.

These locking means may be constructed in different ways, largelydetermined by the varying constructions of the starting devices, uponwhich they are to be used; the locking devices, illustrated in theaccompanying drawings, and hereinafter de-.

1,251,216, prepared for applying thereto the locking device;

Fi 5 is a similar view, showing the looking evice applied thereto, andset in inactive position, and

Fig. 6 a similar view showing the locking device in action;

Fig. 7 is a perspective view of a modified form of my locking device;

Fig. 8 a similar view of another modifie form of my locking device; 1

Fig. 9 is a perspective view of an impulse starter, prepared forapplying this modified form of the locking device thereto;

Fig. 10 a similar, view of the impulse starter with :the locking devicemounted thereon, and set in a tion; and v Figs. 11 and 12 areperspective views of an impulse starter, and of another modified 11c tadform of my iin' in plan view in 11 showing th position and i 1; in e Thelocking device show comprises the ham upon the driven mez T startershown and mentioned; L:

The

the driven member. EidJOlIllEg the spring latch,

21 .1 ege of the hand a,

1 J. the driven member oi the im julse meal i181, so that the positionsof the pin a may lateral register with the bores 6- end. an aperture 5in the bancl a oi the locking vice with the aperture 26 in the rim 1% ofthe impulse starter.

in the modified eonsti'nction my ieelring'device, illustrated in thecntvetl spring 0 is made of e strip cut shape of a tongue from the oflhis is feasible in View the the band a is made of ceitl ireiletl s see;steel possessing sutiicient resiliency for that p11?- ose. M

Both forms oi the locking vice are plied to the impulse starteifhysetting the band a upon the driven member thereot so that the flange (4Will shut against the edge of the mm 14:, ilClj-Dlfllng the tlt ivingmember when the device is essernhlea. The locking device 1s then turnedon the driven member until the a eiture Z; 1n the a ree'ist e 1 with theaperture 2'6 111 the di'iven metnloei". When the leasing set in thisposition, the in a snap bore 6 in the rim 1% of encl prevents shittm ofdirection. This is inactive os the loclnng tieviee,

When it IS te he set in action the end of the curved spring 0 which isset to he closely to the hand a, is EEHSGCL, thereby Withdrawing the pin6 from the bore 2 and driven member 11 is turned t0 the lei-t while thehancl a 1s held a ainst turning with until the pin 9 snaps into the bore8 this position the hand a covers t e 2 in the rim of the cltiven memberof the (iriving member,

ping" eat .8. engagene the a.

a while the engine iii s else prevents the coupling e W'th thecatch-plate holding the chriveia A 11.2 i 1 .L

illO'ulieQ constzuctien, illustrated in Figs. e, and 10, the slat IZZ/1n the band a and set screw 2 a e substituted for the spring latch 0 antpie 2 of the construction illustrated in Fig. l, and e screw-threaded ia e 11 e e b4: ooie v 7 L1 the inn a 0 t c liven mern or ll, for thebores e and 2 The set-screw 2' passes through the slot 7i and isfitteclinto the screw-threaded bore i.; its object is to limit the shiftof the band a upon the Tim 1% of the driven member 11, and to fix theposition of the band a thereon. To move the locking device from itsnormal, inactive positien, which the aperture 7) in the bend a registerswith the aperture 26 in the rim is of the driven member 11, theset-screw "2 is loosened the hand a shifting to the position shown inFig. 10, and then the screw 2'- tightenecl. thus shifting the band, the

epezturefi in rim 1% of the dfiven mem- I her 11 the impulse starter, iscovered, and the coupling member 21' of the impulse starter is held inengagement with the drivins; member 15, whereby the driven and thedriving memhers are permanently coupled. 103 locking device, illustratedin Figs. 11, p 13, is made in the term of e spring turn-bolt is,tiii'nahly secured by the setscre' to the rim 1 of the impulse stattenin position t0 cover apertuie 28 to holcl the coupling device, when setas shown in 12, lhe' set-screw m passes thretwh a perforation in thebase of the leaking; isvice Z: engages in cotrespendingly screw-threadedbore in the oi the lriveninember 11 of the HIIQUlSE starter The rearencl 7c of the turn-bolt is is bent 11 at an approximately right angleto its base, anal the portion n of the rim 14; is flattened tofacilitate the operation of shifting, or turning the beit is "from itsinactive position (shown in ii) to its active position in 12. When thebolt is is set in h t is posi n it closes the aperture 26 in the runtllG impulse starter and prevents f claim as my inveiition:

The combination with an impulse starter, ceznprising a driven anol adriving and a movabl coupling device,

weenie adapted to be moved in position to rigidly connect th driven andthe driving member, of a locking device, movably mounted thereon, andadapted to be set to hold the coupling device in the position rigidlyc011- nectine: the driven with the driving member; substantially asherein shown andv described.

:2. The combination with an impulse 10 starter, comprising a driving anda driven 2;.e1nber, and a reciprocally movable coupling device, adaptedto join the driven and the driving members together, when moved in oneposiiion; of a locking device, 'tnrnaoly mounted on the impulse stai-er, and edapied i0 be set to hold the coupi g device permanently in itsposition, ecu; ling driven and the driing znemhers iovler; substantiallyas herein shown and crihed. The combination with an impulse .3",coniprisin a driven and a driving; or and a movable cou oling device, tobe moved in position coupiing' ven member with the driving memis, e.manually operateble locking device,

niovebiy mounted on the impuise starter,

adapted to be set in active or inactive posh tions, and means for fixingit in. either position, the said locking device, when see in activeposition, holding the coupling device fixedly in the position, couplingtogether ihe driven and the driving niem erg substanticliy as hereinshown and described.

4. The combination with impulse starter, comprising a driving and adriven member, a reciprocally movable coupling device, permanentlyengaging with the driven member, and means thereon, and on the drivingmember, adapted to interlock when the coupling";- device is moved e9eicct its engagement with the driving n nber, thereby coupling th drivenand no d v ing members to turnabiy filfillnici on the driven rh adaptedto be set hold ihe cc vice permanently in engagern driving member; 7substantially shown and described)

